Originally Posted by yamahaSHO
Let's get this straight... A bad gasket is NOT the OP's fault.
Or IAGs, which was my point.
Not checking the gasket for foreign material is absolutely the OPs fault (if that's what the problem is). A responsible builder always fully inspects the gaskets. We always inspect ours. The customer who didn't had a coolant leak just like that.
We sold him the gaskets, but that doesn't make it our fault.
It's just a loose piece of cardboard. It doesn't mean the gasket is bad.